Loom-dobby.



@MM fg .MM/f' TQHAWQRTH. J.. BRIGGS L W. AYREY.

LOOM BOBBY.

APPLIGATION Hmm SEPT. le, 1907.

942982@ Patented Deo. 7, i909.

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TLHAWORT-E, J., BRIGGS 6L W. AYREY. LOOM BOBBY.

APPLICATION FILED SEPT. s. 1907.

Partem'y Das., 7, w09. v

3 SHEETS-SHEET 2.

ANDREW. s. nimm co., PMovo-unocmwsas. vusmnmon. D c.

l T, HAWORTHy Js BRIGGS E W. AYREY.,

LUOM DGBBY.

APPLIOATION FILED SEPT. 3 1907.

Patented Bea 7, 1909n 3 SHEETS-SHEET 3 y i im u i F: a, I E

THOMAS HAWORTH, JOSEPH Bl-IGGS, AND WLLA'II AYE/EY, F RSl-TON, ENGLAND,

ASSIGNORS T0 RICHARD HENRY ELACE, OF' RISHTON, ENGLAND, AND GEORGECRAWSHAW, OF CLAYTONLEMOORS, ENGLAND.

LOOM-BOBBY.

.To all who/m it may concern:

Be it known that we, THOMAS Hawon'rrr, J'osnrrr Braces, and WILLIAMAYREY, subjects of the King of Great Britain, residing at lishten,Lancashire, England, and trading as the EAGHILL Donny Co., Eachill Lane,lishton aforesaid, have invented certain new and useful Improvements inLoom-Dobbies, of which the following is a specification.

This invention relates to loom dobbies and the object thereof is toprovide a loom dobby in a manner as hereinafter set forth which shall beeilicient in its use, strong, durable, comparatively simple in itsconstruction, and readily set up.

llrietly described, the invention relates to a loom (lobby embodying aseries of pairs of jack levers, each pair being set end to end in thedebby and fulcrumed at a suitable distance from their inner or adjacentends and so disposed that when actuated they will be depressed at theirinner or adjacent ends and elevated at their outer ends thereby liftingthe healds.

In the drawings which forni a part of this specification :#.Figure 1 isa sectional elevation of a dobby frame showing a dobby in accordancewith this invention. Fig. 2 is a rear view of the dobby when fixed to aloom. Fig, 3 a. front view of the dobby. F et, 5 and 6 are details, andFig. 7 is a side elevation illustrating the extra jack lever'. Fig. S isan end elevation of a dobby frame and dobby, in accordance with thisinvention and showing the parts at right angles to the position thereofillustrated by Fig. 1. Figs. t) and 10 are detail views respectively inelevation and plan of one of the balk levers.

Referring to the drawings in detail, 1, 2 denote jack levers of a pair,said levers having their ends 3, 1lpositioned adjacent each other andare furthermore fulcrumed upon the rods 5, 6 which extend from the frontto the back of the dobby and may be formed if desired with astrengthening rib increasing in depth toward the middle of the rod.Centrally disposed of the dobby frame and positioned between and overthe ends 3, l of the jack levers 1, 2 is a vertical rod 7 having lateralott-sets S, these latter resting upon the ends 3, l of the jack levers.The rod 7 Specification of Letters Patent.

Application filed September 3, 1907.

Patented Dec. 7, 1999.

Serial No. 391,110.

is formed with a depending tail piece 9 which extends between the ends3, 4 of the jack levers 1, 2 and enters grooves formed in the said endsof the said levers.

The reference character 11 denotes a horizontally extending balk leverprovided with a recess 10 which. receives the upper end of the rod 7.Side fins 12 are connected to or formed integral with the rod 7 andadapted to enter recesses in the balk levers l1. rEhe rod 7 is shiftedvertically through the medium of the jack levers 1, 2 when such leversare actuated and to steady the movement of the rod 7 guide rods 5-1 areprovided between which 'the rod 7 extends. lt will be assumed that thereis a vertical rod associating with each pair of jack levers and a balklever asscciating with each of lthe rods 7. Angular brackets 13 arelixed to the sides of the dobby frame and against said bracket 13 abutthe balk levers. rFliese latter' are enforced by the weight of thehea-lds and the pull of the loom against the said brackets 1B.

The dobby comprises a plurality of draw bars. Each of the draw bars isindicated by the reference character 111 and is formed with an uprightlimb 15 having an inclined head 1G and a lower depending limb 17 whichhas its lowest extremity formed with a draw hook 1S. The draw bar isseated in the recess in the top of the balk lever and upon a curvedrounded base 19 whereby the said draw bar 1.4L is free to move therein.The draw bar is retained in place through the medium of a lin 20 and alip 21 which are connected to or formed integral with the balk lever.

Disposed over the inclined heads of the draw bars 14E are feelers 22 anda3. The former is acted upon by pattern cylinder A and the latter bypattern cylinder B. Pattern cylinder B is shown in the inoperativeposition while pattern cylinder A is illustrated as in action. Thepattern cylinders are each provided with a series of pegs a. The peg onthe pattern cylinder A. is shown in the act of pushing inwardly thefeeler 23 which has the effect of withdrawing the extremity 24 of saidfeeler 23 away from the inclined head 16 of the draw bar 14 so as toliberate the latter and allow its draw hook 18 to fall into engagementwith the draw knife 25, as clearly shown in Fig. 1. The

balk lever is thus drawn down at this end and the vertical rod 7 islowered so as to shift the jack levers 1, 2 and elevate the healds.r1`he feeler 22 and draw bar 14 are respectively operated in a similarmanner. The feelers 22, 23 are separatedfrom each other by comb-likegrates 26 and the draw bars 14 are separated through the medium ofsimilar' grates 27.

The pattern cylinders A and B are mounted in a frame 28 slidably mountedin the grooves or channels formed by the flanges 30 and 31 on the dobbyframe. The ends of the slide frame 28 are slotted to receive the bossesor brackets 32, these latter' being also slotted whereby they can beadjustably secured by suitable hold-fast devices to the ends of theslide frame 28. The function of the slide frame 28 is to shift eitherpattern cylinder into or out of position to act upon the dobby feelers,while at the same time the actuating means for the 4cylinders arebrought into or out of gear with their respective ratchet wheels bysuitable mechanism controlled by a third or governing cylinder At onepart of the pattern surface of each of the cylinders A and B is fixed apeg which according to whichever cylinder A or B may be in motion,throws into action an extra jack lever 331. 'lhe latter is mounted inthe dobby frame alongside the jack levers 1, 2, for convenience notshown in Figs. 2 and 3, but separately shown in F ig. 7. The jack lever33b is formed with an arm 34 to which is pivoted a pawl or catch 35engaging with the ratchet 33c formed on the shaft of the cylinder 33. Afeeler 36 associates with the cylinder 33. The feeler 36 is pivoted asat 37 to the dobby frame. The feeler 36 has connected to one end thereofa vertically extending rod 38 which engages with and is adapted to liftthe rocking lever 39. Pegs 33d associate with the cylinder 33. lf a peg33d comes up on the cylinder 33, cylinder B revolves again, but if ablank is presented to the feeler 36, it is lowered as will be evidentand raises the vertical rod 38 which lifts the rocking lever 39. Thelatter is fitted with studs 40 and 41 at each end, the former of whichraises the pawl or catch 42 clear of the ratchet 42a on the shaft ofcylinder B while at the same time the stud 41 allows the pawl or catch43 to fall in gear with the ratchet 44 on the shaft of cylinder A.

Movement is imparted to the slide frame 28 when the catch 43 engageswith the ratchet 44 so as to bring the cylinder A in position 'to actupon the dobby feelers and to throw out of operation cylinder B throughthe medium of the catches 45 and 46 which are connected to the rockinglever 39 by the wire links or chains 47. With the rocking movement ofthe lever 39 the catch 45 is br'otght into engagenient lwith the catch'plate 48 while the catch 46 is raised clear of the same. The catch plate48 is adapted to oscillate and for this purpose an oscillatory T-shapedlever 49 is provided, the latter being fixed to a shaft 50. Adjustablyconnected to the ends of the T-shaped lever 49 are the rods 51, 52.These latter are adapted to actuate the dobby knives 53 which slide inslots in the dobby frame. Small cylindrical carriers 55 provided withlugs 56 are mounted on pins or studs 57 on the dobby knives, and thesecylinders are tapped to fit on the ends of the rods 51, 52 and retainedin position by the nuts 58. The T-shaped lever 49 is connected by a link58 to an L- shaped lever 59 mounted on a shaft 60, the latter' beingcarried by brackets 61 fixed to the dobby frame. The L-shaped lever 59is actuated by the usual dobby rod 64.

As clearly shown in Figs. 4, 5 and 6, motion is communicated to thedobby rod 64 by means of a small quadrant rod 62 provided with a curvedslot 63. One end of the dobby rod is adjustable, this end beingindicated by the reference character 64a and is mounted on a stud 65which travels in the slot 63 formed in the quadrant 62. By varying theposition of the lug 64a, more or less time may be given to the motion ofthe dobby.

'lhe shaft 50 extends across the dobby as shown in Fig. 2 and has fixedthereto a spring lever 66, to each end of which is suitably connected arod 67 for operating a dobby knife 53.

Each of the pattern cylinders works both sets of feelers when in motion.The pattern cylinder A is presumed to be in motion in Fig. 1, and when apeg on it acts upon the feeler 23 it liberates the left-hand verticalplaten, but when a peg on it acts upon the feeler 22, it liberates theright-hand vertical platen, both platens being mounted upon the balklever 11. By referring to Fig. 8 the means for putting the governingcylinder 33 into action will be readily understood. 1When the patterncylinder' A, which is at the back end of the dobby, is in motion, andmakes one complete revolution, a special peg on it works one or theother of the additional feelers 81, thus operating the additional jacklever 80, and moving the ratchet wheel of the governing cylinder 33 tothe extent of one tooth by means of catch 35. This brings an other cardupon the cylinder 33, and if said card is a blank the pattern cylinderwill continue to move by reason of the fact that the lever 36 will notbe raised, but if this card be provided with a peg, the patterncylinders will be reversed by raising the lever 36, and if ten blankcards come up in succession on cylinder 33, the pattern cylinder willhave a continuous revolution as long as such operation ensues, or saidpattern cylinder will revolve ten times, and if a peg comes up, the

pattern cylinder B will be put in action. The operation of the patterncylinder B is precisely similar to the pattern cylinder A.

rlhe slide frame 2S has attached to it one end of a rocking lever 70.The latter is mounted on a shaft 7l and formed at its top with tworecesses 72 and 73, into which springs a catch 74 through the action ofa spring 75 with each reversal of the slide frame and change ofcylinders.

That we claim is:-

l. ln a loom dobby, jack levers, vertically movable rods for actuatingsaid levers, said rods provided with side fins, and balk levers adaptedto receive the upper ends of said rods and the fins on the rods.

In a loom dobby, jack levers, vertically movable rods for actuating saidlevers, said rods provided with side fins, balk levers adapted toreceive the upper ends of said rods and the tins on the rods, and saidrods provided with tail pieces adapted to engage in the jack levers.

In a loom dobby, ack levers, vertically movable rods for actuating saidlevers, said rods provided with side fins, horizontally disposed balklevers adapted to receive the upper ends of said reds and the iins onthe rods, and draw-bars seated upon the balk levers and each providedwith an upwardly projected extension having an inclined head and adepending extension having a hooked terminal adapted to engage with thedobby knife.

4. A loom dobby comprising horizontally disposed balk levers, draw barsseated upon the balk levers and each provided with an upwardly projectedextension having an inclined. head and a depending extension having ahooked terminal adapted to engage with the dobby knife, dobby feelersadapted to act upon the inclined heads of the draw bars, jack levers,and vertically movable rods for actuating said levers and provided withprojecting means, the balk levers receiving the upper ends of said rodsand projecting` means.

5, A loom dobby comprising` horizontally disposed balk levers, draw barsseated upon the balk levers and each provided with an upwardly projectedextension having an inclined head and a depending extension having ahooked terminal adapted to engage with the dobby knife, dobby feelers toact upon the inclined heads of the draw bars, pattern cylinders, ashiftable frame carrying the dobby cylinders and adapted to bring saidcylinders in position to act upon the feelers, jack levers, verticallymovable rods for actuating said levers having projeeting means, the balklevers receiving the upper ends of said rods and the projecting meansthereof, and means for operating the said frame.

G. A loom dobby comprising horizontally disposed balk levers, draw barsseated upon the balk levers and each provided with an upwardlyprojecting extension having an inclined head and a depending extensionhaving a hooked terminus adapted to engage with the dobby knife,combined with dobby feelers adapted to act upon the inclined heads ofthe draw bars, pattern cylinders, a slide frame carrying the dobbycylinders and adapted to bring said cylinders in position to act uponthe feelers, and means for shifting` the slide frame.

7. A loom dobby comprising horizontally disposed balk levers, draw barsseated upon the balk levers and each provided with an up f'ardlyprojecting extension having an inclined head and a depending extensionhaving a hooked terminus adapted to engage with the dobby knife,combined with dobby feelers adapted to act upon the inclined heads ofthe draw bars, pattern cylinders, a slide frame carrying the dobbycylinders and adapted to bring said cylinders in position to act uponthe feelers, means for shifting` the slide frame, and means forcontrolling the movement of the pattern cylinders.

In testimony whereof we have hereunto set our hands in presence of twosubscribing witnesses.

THOMAS HAVVORTH. JOSEPH BRIGGS. "WILLIAM AYREY.,

Witnesses ELLIS D. LITTLE, HERBERT VVILsoN.

